(function($){
	$.formatDate = function(pattern,date){
		//如果不设置，默认为当前时间
		if (!date) {
			date = new Date();
		}
		if (typeof (date) === "string") {
			if (date == "") {
				date = new Date();
			}
			else {
				date = new Date(date.replace(/-/g, "/"));
			}
		}
		/*补00*/
		var toFixedWidth = function(value) {
			var result = 100 + value;
			return result.toString().substring(1);
		};

		/*配置*/
		var options = {
			regeExp: /(yyyy|M+|d+|h+|m+|s+|ee+|ws?|p)/g,
			months: ['January', 'February', 'March', 'April', 'May',
				'June', 'July', 'August', 'September',
				'October', 'November', 'December'],
			weeks: ['Sunday', 'Monday', 'Tuesday',
				'Wednesday', 'Thursday', 'Friday',
				'Saturday']
		};

		/*时间切换*/
		var swithHours = function(hours) {
			return hours < 12 ? "AM" : "PM";
		};

		/*配置值*/
		var pattrnValue = {
			"yyyy": date.getFullYear(),                      //年份
			"MM": toFixedWidth(date.getMonth() + 1),           //月份
			"dd": toFixedWidth(date.getDate()),              //日期
			"hh": toFixedWidth(date.getHours()),             //小时
			"mm": toFixedWidth(date.getMinutes()),           //分钟
			"ss": toFixedWidth(date.getSeconds()),           //秒
			"ee": options.months[date.getMonth()],           //月份名称
			"ws": options.weeks[date.getDay()],              //星期名称
			"M": date.getMonth() + 1,
			"d": date.getDate(),
			"h": date.getHours(),
			"m": date.getMinutes(),
			"s": date.getSeconds(),
			"p": swithHours(date.getHours())
		};

		return pattern.replace(options.regeExp, function() {
			return pattrnValue[arguments[0]];
		});
	};
  
  
	$.formatFloat= function(value, num) {
		if (!value) {
			return "";
		}
		if (!num || num < 0) {
			num = 2;
		}

		return value.toFixed(2);
	};
  
})(jQuery);